ORA-00391: All threads must switch to new log format at the same time

admin

ORA-00391: All threads must switch to new log format at the same time
Cause:  An attempt to switch the current log of a single thread is not allowed
because the compatiblity requirements force a new log format version number.
When changing log formats, all threads must switch to the new format at the same
time.
Action:   Open the database to cause the coor dinated log switch. If that is not
possible then return to the same software version and compatibility setting last
used to open the database.